As one of the important phenomenon of global change, nitrogen (N) deposition would influence the ecological stoichiometry of plant. In this study, an experiment of 12 months on the effects of N deposition on ecological stoichiometry of leaves of Moso bamboo under extensive management in subtropical China was conducted. The simulated N deposition method was used with three treatments of 30 kg·ha~(-1)·a~(-1) (L), 60 kg·ha~(-1)·a~(-1) (M), 90 kg·ha~(-1)·a~(-1) (H), and the control. The results showed that simulated N deposition significantly increased contents of C, N and P of leaves (P<0.05), and these effects on C and P contents became stronger generally with N deposition level. The contents of C, N and P of leaves did not show regular changes between Moso bamboo of different age under the same N deposition level. The C︰N︰P ratios of leaves showed relative stability among the different N deposition treatments. There was significantly positive correlation between C content and N content of leaves of 3-year-old Moso bamboo. The N deposition level alone and combined with Moso bamboo age had significant effects on the contents of C, N and P and ratios of C︰N, C︰P and N︰P, while Moso bamboo age alone only significantly impacted C content and C︰N ratio. Our findings indicate that the productivity of Moso bamboo forest under extensive management was still limited by N element, and the increasing N deposition would facilitate the productivity of Moso bamboo, which would contribute to more biomass carbon accumulation.